SPIFFS文件系统STM32移植工程分享-第8页回答

SPIFFS文件系统STM32移植工程分享

2019-12-17 21:28发布

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99条回答

1楼-- · 2019-12-23 04:49

LZ怎么样在文件内容后面追加数据内容的啊，怎么我这样总是不行的呢

char WriteBuf[]={"Hi,Budy! if you get this Message......Congratulations!You have succeeded!!"};
char WriteBuf1[]={"append! if you get this Message......Congratulations!You have append succeeded!!"};
char ReadBuf[500];
//????,???????,????
spiffs_file fd = SPIFFS_open(&SPIFlashFS, "my_file", SPIFFS_CREAT | SPIFFS_TRUNC | SPIFFS_RDWR, 0);
//???
if (SPIFFS_write(&SPIFlashFS, fd, WriteBuf, sizeof(WriteBuf)) < 0)
printf("errno %i ", SPIFFS_errno(&SPIFlashFS));
SPIFFS_close(&SPIFlashFS, fd);
//???
fd = SPIFFS_open(&SPIFlashFS, "my_file", SPIFFS_RDONLY, 0);
if (SPIFFS_read(&SPIFlashFS, fd, ReadBuf, sizeof(ReadBuf)) < 0)
printf("errno %i ", SPIFFS_errno(&SPIFlashFS));
SPIFFS_close(&SPIFlashFS, fd);
//????????
printf("%s ", ReadBuf);
/////////////////////////////////////
res = SPIFFS_stat(&SPIFlashFS, "my_file", &s);
printf("%d ",s.size);
////////////////////////////////////////////////////////////
fd = SPIFFS_open(&SPIFlashFS, "my_file", SPIFFS_RDWR, 0);
ss = SPIFFS_lseek(&SPIFlashFS, fd, s.size, SPIFFS_SEEK_CUR);
printf("@@%d@@ ",ss);
if (SPIFFS_write(&SPIFlashFS, fd, WriteBuf1, sizeof(WriteBuf1)) < 0)
printf("errno %i ", SPIFFS_errno(&SPIFlashFS));
SPIFFS_close(&SPIFlashFS, fd);
fd = SPIFFS_open(&SPIFlashFS, "my_file", SPIFFS_RDONLY, 0);
if (SPIFFS_read(&SPIFlashFS, fd, ReadBuf, sizeof(ReadBuf)) < 0)
printf("errno %i ", SPIFFS_errno(&SPIFlashFS));
SPIFFS_close(&SPIFlashFS, fd);
printf("%s ", ReadBuf);